Process of treating oils



Patented Jan. 2, 1940 UNITED STATES PATENT OFFICE PROCESS OF TREATING OILS Robert S. McKinney, Chevy Chase, Md.; dedicated to the free use of the People of the United States of America.

No Drawing. Application March 29, 1938, Serial No. 198,698

8 Claims. (01. 260-407) (Granted under the act oi March 3, 1883, as amended April 30, 1928; 370 0. G. 757) This application is made under the act of March Having thus described my invention, I claim: 3, 1883, as amended by the act of April 30, 1928, 1. The process for increasing the drying properand the invention herein described, if patented, ties of weak drying oils and semi-drying oils, may be manufactured and used by or for the which process comprises heating said oils at a 8 Government of the United States of America for temperature of 200 C. to 250 C. for two to eightgovernmental purposes without the payment to een hours with about 0.1% of an alkaline yme of any royalty thereon. droxide.

I hereby dedicate the invention herein described 2. The process for increasing the drying propto the free use of the People of the United States erties of weak drying Oils and Se y Oilsm of America to take eifect on the granting of a which process comprises heating said oils at a 3 patent to me. temperature of 200 C. to 250 C. for two to eight- This invention relates to a new process for ineen hours with about 0.1% of potassiumhycreasing the drying properties of the weak drying droxide.

oils and semi-drying oils. 3. The process for increasing the drying prop- I have found that the weak drying oils, such as, erties of weak drying oils nd se iyi oils. 1

soybean oil, safllower oil and linseed oil, and the which process comprises heating said oils at a semi-drying oils, such as, cottonseed oil, corn oil temperature of 200 C. to 250 C. for two to and kapok oil. when heated strongly in the preseighteen hours with about 0.1% of an alkaline ence of small amounts of the alkali hydroxides, earth oxide,

no such as, sodium hydroxide, potassium hydroxide 4. The process for i c easi the dryin p opand lithium hydroxide, or with small amounts of erties of weak drying ls and miyi 0118, the oxides, hydroxides, or fatty acid salts of the which process co p ting Said 0115 at a alkaline earths, such as, barium oxide,- calcium temperature of 200 C. to'250" C. for two to oxide and magnesium oxide, barium hydroxide, eighteen hours with about 0.1% of calcium o i as calcium hydroxide, magnesium hydroxide and The pro e s f r in r in the yin Dr pcalcium linolenate, barium linoleate, and magneerties W drying Oils n -dryin ls. slum oleate, yield oils which are much superior in which process comprises heating Said Oils t a drying properties to the original oils. Such oils mp rature of 200 C. to 250 C. for two to when heated without the presence of any of the eighteen hours With about 0 & fatty acid 30 above-mentioned substances or their equivalents salt of an alkaline earth.

are found to change little in respect to drying 6. The Process for increasing the dry D D- properties. erties of weak drying oils and semi-drying oils, In yin ou my invention, I add a. sm ll which process comprises heating said oils at a portion (about 0.1%) of the alkaline hydroxide temperature of to for 70 b0 88 or alkaline earth oxide, hydroxide, or fatty acid f g zz hours with about of calcium salt of an alkaline earth to the refined anhydrous oil and strongly heat the mixture at 200 0. to The inmasmg the drying 250 C. for two to eighteen hours, preferably in erfles of weak drying oils and semi'drymg an inert atmosphere to prevent oxidation. The which process comprises heating said at 40 oil is then allowed to cool, preferably in an inert z g fig gg g 3r atlgouzg atmosphere.

Oils or the class described when treated in this fi gg fif igg for'mcmsing the drying propmanner dry to film dry to the touch in time erties oi weak drying oils and semi-drying oils. 6 when spread out in a thin layer on glass. while which process comprises heating id 11 t a the original oils and oils heated in a similar mantemperature of 200 C. to 250 C. for two to ner without any or the substances above enumereighteen hours with about 0.1% of calcium hyated showed little evidence of drying in an equal droxide.

length 01' time. I ROBERT S. MCKINNEY. 

